freebsd-nq/usr.bin/clang/llvm-extract/llvm-extract.1
Dimitry Andric f785676f2a Upgrade our copy of llvm/clang to 3.4 release. This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC after:	1 month
2014-02-16 19:44:07 +00:00

130 lines
3.5 KiB
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.TH "LLVM-EXTRACT" "1" "2014-01-01" "3.4" "LLVM"
.SH NAME
llvm-extract \- extract a function from an LLVM module
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.SH SYNOPSIS
.sp
\fBllvm\-extract\fP [\fIoptions\fP] \fB\-\-func\fP \fIfunction\-name\fP [\fIfilename\fP]
.SH DESCRIPTION
.sp
The \fBllvm\-extract\fP command takes the name of a function and extracts
it from the specified LLVM bitcode file. It is primarily used as a debugging
tool to reduce test cases from larger programs that are triggering a bug.
.sp
In addition to extracting the bitcode of the specified function,
\fBllvm\-extract\fP will also remove unreachable global variables,
prototypes, and unused types.
.sp
The \fBllvm\-extract\fP command reads its input from standard input if
filename is omitted or if filename is \fB\-\fP\&. The output is always written to
standard output, unless the \fB\-o\fP option is specified (see below).
.SH OPTIONS
.sp
\fB\-f\fP
.INDENT 0.0
.INDENT 3.5
Enable binary output on terminals. Normally, \fBllvm\-extract\fP will
refuse to write raw bitcode output if the output stream is a terminal. With
this option, \fBllvm\-extract\fP will write raw bitcode regardless of the
output device.
.UNINDENT
.UNINDENT
.sp
\fB\-\-func\fP \fIfunction\-name\fP
.INDENT 0.0
.INDENT 3.5
Extract the function named \fIfunction\-name\fP from the LLVM bitcode. May be
specified multiple times to extract multiple functions at once.
.UNINDENT
.UNINDENT
.sp
\fB\-\-rfunc\fP \fIfunction\-regular\-expr\fP
.INDENT 0.0
.INDENT 3.5
Extract the function(s) matching \fIfunction\-regular\-expr\fP from the LLVM bitcode.
All functions matching the regular expression will be extracted. May be
specified multiple times.
.UNINDENT
.UNINDENT
.sp
\fB\-\-glob\fP \fIglobal\-name\fP
.INDENT 0.0
.INDENT 3.5
Extract the global variable named \fIglobal\-name\fP from the LLVM bitcode. May be
specified multiple times to extract multiple global variables at once.
.UNINDENT
.UNINDENT
.sp
\fB\-\-rglob\fP \fIglob\-regular\-expr\fP
.INDENT 0.0
.INDENT 3.5
Extract the global variable(s) matching \fIglobal\-regular\-expr\fP from the LLVM
bitcode. All global variables matching the regular expression will be
extracted. May be specified multiple times.
.UNINDENT
.UNINDENT
.sp
\fB\-help\fP
.INDENT 0.0
.INDENT 3.5
Print a summary of command line options.
.UNINDENT
.UNINDENT
.sp
\fB\-o\fP \fIfilename\fP
.INDENT 0.0
.INDENT 3.5
Specify the output filename. If filename is "\-" (the default), then
\fBllvm\-extract\fP sends its output to standard output.
.UNINDENT
.UNINDENT
.sp
\fB\-S\fP
.INDENT 0.0
.INDENT 3.5
Write output in LLVM intermediate language (instead of bitcode).
.UNINDENT
.UNINDENT
.SH EXIT STATUS
.sp
If \fBllvm\-extract\fP succeeds, it will exit with 0. Otherwise, if an error
occurs, it will exit with a non\-zero value.
.SH SEE ALSO
.sp
bugpoint
.SH AUTHOR
Maintained by The LLVM Team (http://llvm.org/).
.SH COPYRIGHT
2003-2013, LLVM Project
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